Product Overview

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Figure 24: MAIN BURNER FLAME - 1” BURNERS
17) Test thermostat operation while the boiler is running. Turn the thermostat to the lowest setting. Both pilot burner and
mainburnersshouldstopring.Raisethethermostatbacktothehighestsetting.Thepilotburnerandmainburners
should relight.
18) Verify low water cutoff operation while the boiler is running. Slowly open drain valve and drain boiler until the water
level drops below low water cutoff line. Water still should be visible in the gauge glass when the low water cutoff shuts
downthemainburners.Bothpilotburnerandmainburnersshouldstopring.Makesurepressurelimit,thermostator
othercontrolshavenotshutofftheboiler.Upontestcompletionrelltheboilertothenormalwaterlevel.
19) Check pressure limit control operation. When steam pressure is registered on pressure gauge, lower pressure limit setting
belowgaugereading.Bothpilotburnerandmainburnersshouldstopring.Raisepressurelimitsettingabovegauge
reading. The pilot burner and main burners should relight.
20) After the boiler has operated for approximately 30 minutes, check the boiler and heating system piping for leaks. Repair
any leaks found at once.
21) Inspecttheventsystemforuegasleaks.Repairanyleaksfoundbeforeleavingtheboilerinoperation.
22) Replacementofasteamboilertendstobreaklooseaccumulatedscalefromthesystem.Duringtherstweekof
operation, blow down the #67 low water cut-off at least three times following the blow down instructions on the yellow
sticker adjacent to the low water cut-off.
23) After new boiler has been installed and put into continuous operation for several days, clean the boiler of oil, grease,
sludge, and other contaminants that may have been present in existing piping. This will prevent unsteady water line and
water carry over into supply main. The boiler boil-out should be done as follows:
a) Turn off gas supply to boiler per the Operating Instructions. See Figure 23.
b) Drain water from boiler until about one inch of water is visible in gauge glass.
c) Run a hose or temporary piping from the boiler drain valve to a location where hot water can be safely discharged.
Drainapproximatelyvegallonsofwaterfromtheboilerandmix-inanappropriateamountofanapprovedboil-out
compound.Removesafetyvalveandrelltheboilerwithpreparedsolutionthroughfunnelinsertedintoelbowunder
the safety valve. Run a hose or temporary piping from safety valve tapping to a location where hot water can be
safely discharged. DO NOT INSTALL ANY VALVES IN THIS LINE.
d) Light off the boiler per the Operating Instructions. See Figure 23. Run boiler for several hours, boiling the water,
withoutgeneratingsteampressure.Openthewaterfeedvalvesufcientlytoallowaslightoverowofwaterthrough
the safety valve tapping drain line. Continue boiling until water coming out is clear.
XI. System Start-up (continued)